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quickjs-libc.c
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quickjs-libc.c
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/*
* QuickJS C library
*
* Copyright (c) 2017-2019 Fabrice Bellard
* Copyright (c) 2017-2019 Charlie Gordon
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#if defined(_WIN32)
#include <windows.h>
#include <conio.h>
#else
#include <dlfcn.h>
#include <termios.h>
#include <sys/ioctl.h>
#if defined(__APPLE__)
typedef sig_t sighandler_t;
#endif
#endif
#include "cutils.h"
#include "list.h"
#include "quickjs-libc.h"
static void js_std_dbuf_init(JSContext *ctx, DynBuf *s)
{
dbuf_init2(s, JS_GetRuntime(ctx), (DynBufReallocFunc *)js_realloc_rt);
}
/* TODO:
- add exec() wrapper
- add minimal VT100 emulation for win32
- add socket calls
*/
typedef struct {
struct list_head link;
int fd;
JSValue rw_func[2];
} JSOSRWHandler;
typedef struct {
struct list_head link;
int sig_num;
JSValue func;
} JSOSSignalHandler;
typedef struct {
struct list_head link;
BOOL has_object;
int64_t timeout;
JSValue func;
} JSOSTimer;
/* initialize the lists so js_std_free_handlers() can always be called */
static struct list_head os_rw_handlers = LIST_HEAD_INIT(os_rw_handlers);
static struct list_head os_signal_handlers = LIST_HEAD_INIT(os_signal_handlers);
static struct list_head os_timers = LIST_HEAD_INIT(os_timers);
static uint64_t os_pending_signals;
static int eval_script_recurse;
static int (*os_poll_func)(JSContext *ctx);
static JSValue js_printf_internal(JSContext *ctx,
int argc, JSValueConst *argv, FILE *fp)
{
char fmtbuf[32];
uint8_t cbuf[UTF8_CHAR_LEN_MAX+1];
JSValue res;
DynBuf dbuf;
const char *fmt_str;
const uint8_t *fmt, *fmt_end;
const uint8_t *p;
char *q;
int i, c, len;
int32_t int32_arg;
int64_t int64_arg;
double double_arg;
const char *string_arg;
enum { PART_FLAGS, PART_WIDTH, PART_DOT, PART_PREC, PART_MODIFIER } part;
int modsize;
/* Use indirect call to dbuf_printf to prevent gcc warning */
int (*dbuf_printf_fun)(DynBuf *s, const char *fmt, ...) = (void*)dbuf_printf;
js_std_dbuf_init(ctx, &dbuf);
if (argc > 0) {
fmt_str = JS_ToCStringLen(ctx, &len, argv[0], FALSE);
if (!fmt_str)
goto fail;
i = 1;
fmt = (const uint8_t *)fmt_str;
fmt_end = fmt + len;
while (fmt < fmt_end) {
for (p = fmt; fmt < fmt_end && *fmt != '%'; fmt++)
continue;
dbuf_put(&dbuf, p, fmt - p);
if (fmt >= fmt_end)
break;
q = fmtbuf;
*q++ = *fmt++; /* copy '%' */
part = PART_FLAGS;
modsize = 0;
for (;;) {
if (q >= fmtbuf + sizeof(fmtbuf) - 1)
goto invalid;
c = *fmt++;
*q++ = c;
*q = '\0';
switch (c) {
case '1': case '2': case '3':
case '4': case '5': case '6':
case '7': case '8': case '9':
if (part != PART_PREC) {
if (part <= PART_WIDTH)
part = PART_WIDTH;
else
goto invalid;
}
continue;
case '0': case '#': case '+': case '-': case ' ': case '\'':
if (part > PART_FLAGS)
goto invalid;
continue;
case '.':
if (part > PART_DOT)
goto invalid;
part = PART_DOT;
continue;
case '*':
if (part < PART_WIDTH)
part = PART_DOT;
else if (part == PART_DOT)
part = PART_MODIFIER;
else
goto invalid;
if (i >= argc)
goto missing;
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
q += snprintf(q, fmtbuf + sizeof(fmtbuf) - q, "%d", int32_arg);
continue;
case 'h':
if (modsize != 0 && modsize != -1)
goto invalid;
modsize--;
part = PART_MODIFIER;
continue;
case 'l':
q--;
if (modsize != 0 && modsize != 1)
goto invalid;
modsize++;
part = PART_MODIFIER;
continue;
case 'c':
if (i >= argc)
goto missing;
if (JS_IsString(argv[i])) {
string_arg = JS_ToCString(ctx, argv[i++]);
if (!string_arg)
goto fail;
int32_arg = unicode_from_utf8((uint8_t *)string_arg, UTF8_CHAR_LEN_MAX, &p);
JS_FreeCString(ctx, string_arg);
} else {
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
}
/* handle utf-8 encoding explicitly */
if ((unsigned)int32_arg > 0x10FFFF)
int32_arg = 0xFFFD;
/* ignore conversion flags, width and precision */
len = unicode_to_utf8(cbuf, int32_arg);
dbuf_put(&dbuf, cbuf, len);
break;
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
if (i >= argc)
goto missing;
if (modsize > 0) {
if (JS_ToInt64(ctx, &int64_arg, argv[i++]))
goto fail;
q[1] = q[-1];
q[-1] = q[0] = 'l';
q[2] = '\0';
dbuf_printf_fun(&dbuf, fmtbuf, (long long)int64_arg);
} else {
if (JS_ToInt32(ctx, &int32_arg, argv[i++]))
goto fail;
dbuf_printf_fun(&dbuf, fmtbuf, int32_arg);
}
break;
case 's':
if (i >= argc)
goto missing;
string_arg = JS_ToCString(ctx, argv[i++]);
if (!string_arg)
goto fail;
dbuf_printf_fun(&dbuf, fmtbuf, string_arg);
JS_FreeCString(ctx, string_arg);
break;
case 'e':
case 'f':
case 'g':
case 'a':
case 'E':
case 'F':
case 'G':
case 'A':
if (i >= argc)
goto missing;
if (JS_ToFloat64(ctx, &double_arg, argv[i++]))
goto fail;
dbuf_printf_fun(&dbuf, fmtbuf, double_arg);
break;
case '%':
dbuf_putc(&dbuf, '%');
break;
default:
/* XXX: should support an extension mechanism */
invalid:
JS_ThrowTypeError(ctx, "invalid conversion specifier in format string");
goto fail;
missing:
JS_ThrowReferenceError(ctx, "missing argument for conversion specifier");
goto fail;
}
break;
}
}
JS_FreeCString(ctx, fmt_str);
}
if (dbuf.error) {
res = JS_ThrowOutOfMemory(ctx);
} else {
if (fp) {
len = fwrite(dbuf.buf, 1, dbuf.size, fp);
res = JS_NewInt32(ctx, len);
} else {
res = JS_NewStringLen(ctx, (char *)dbuf.buf, dbuf.size);
}
}
dbuf_free(&dbuf);
return res;
fail:
dbuf_free(&dbuf);
return JS_EXCEPTION;
}
uint8_t *js_load_file(JSContext *ctx, size_t *pbuf_len, const char *filename)
{
FILE *f;
uint8_t *buf;
size_t buf_len;
f = fopen(filename, "rb");
if (!f)
return NULL;
fseek(f, 0, SEEK_END);
buf_len = ftell(f);
fseek(f, 0, SEEK_SET);
if (ctx)
buf = js_malloc(ctx, buf_len + 1);
else
buf = malloc(buf_len + 1);
fread(buf, 1, buf_len, f);
buf[buf_len] = '\0';
fclose(f);
*pbuf_len = buf_len;
return buf;
}
/* load and evaluate a file */
static JSValue js_loadScript(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
uint8_t *buf;
const char *filename;
JSValue ret;
size_t buf_len;
filename = JS_ToCString(ctx, argv[0]);
if (!filename)
return JS_EXCEPTION;
buf = js_load_file(ctx, &buf_len, filename);
if (!buf) {
JS_ThrowReferenceError(ctx, "could not load '%s'", filename);
JS_FreeCString(ctx, filename);
return JS_EXCEPTION;
}
ret = JS_Eval(ctx, (char *)buf, buf_len, filename,
JS_EVAL_TYPE_GLOBAL | JS_EVAL_FLAG_SHEBANG);
js_free(ctx, buf);
JS_FreeCString(ctx, filename);
return ret;
}
typedef JSModuleDef *(JSInitModuleFunc)(JSContext *ctx,
const char *module_name);
#if defined(_WIN32)
static JSModuleDef *js_module_loader_so(JSContext *ctx,
const char *module_name)
{
JS_ThrowReferenceError(ctx, "shared library modules are not supported yet");
return NULL;
}
#else
static JSModuleDef *js_module_loader_so(JSContext *ctx,
const char *module_name)
{
JSModuleDef *m;
void *hd;
JSInitModuleFunc *init;
char *filename;
if (!strchr(module_name, '/')) {
/* must add a '/' so that the DLL is not searched in the
system library paths */
filename = js_malloc(ctx, strlen(module_name) + 2 + 1);
if (!filename)
return NULL;
strcpy(filename, "./");
strcpy(filename + 2, module_name);
} else {
filename = (char *)module_name;
}
/* C module */
hd = dlopen(filename, RTLD_NOW | RTLD_LOCAL);
if (filename != module_name)
js_free(ctx, filename);
if (!hd) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s' as shared library",
module_name);
goto fail;
}
init = dlsym(hd, "js_init_module");
if (!init) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s': js_init_module not found",
module_name);
goto fail;
}
m = init(ctx, module_name);
if (!m) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s': initialization error",
module_name);
fail:
if (hd)
dlclose(hd);
return NULL;
}
return m;
}
#endif /* !_WIN32 */
JSModuleDef *js_module_loader(JSContext *ctx,
const char *module_name, void *opaque)
{
JSModuleDef *m;
if (has_suffix(module_name, ".so")) {
m = js_module_loader_so(ctx, module_name);
} else {
size_t buf_len;
uint8_t *buf;
JSValue func_val;
buf = js_load_file(ctx, &buf_len, module_name);
if (!buf) {
JS_ThrowReferenceError(ctx, "could not load module filename '%s'",
module_name);
return NULL;
}
/* compile the module */
func_val = JS_Eval(ctx, (char *)buf, buf_len, module_name,
JS_EVAL_TYPE_MODULE | JS_EVAL_FLAG_COMPILE_ONLY);
js_free(ctx, buf);
if (JS_IsException(func_val))
return NULL;
/* the module is already referenced, so we must free it */
m = JS_VALUE_GET_PTR(func_val);
JS_FreeValue(ctx, func_val);
}
return m;
}
static JSValue js_std_exit(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
int status;
if (JS_ToInt32(ctx, &status, argv[0]))
status = -1;
exit(status);
return JS_UNDEFINED;
}
static JSValue js_std_getenv(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *name, *str;
name = JS_ToCString(ctx, argv[0]);
if (!name)
return JS_EXCEPTION;
str = getenv(name);
JS_FreeCString(ctx, name);
if (!str)
return JS_UNDEFINED;
else
return JS_NewString(ctx, str);
}
static JSValue js_std_gc(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JS_RunGC(JS_GetRuntime(ctx));
return JS_UNDEFINED;
}
static int interrupt_handler(JSRuntime *rt, void *opaque)
{
return (os_pending_signals >> SIGINT) & 1;
}
static JSValue js_evalScript(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *str;
int len;
JSValue ret;
str = JS_ToCStringLen(ctx, &len, argv[0], FALSE);
if (!str)
return JS_EXCEPTION;
if (++eval_script_recurse == 1) {
/* install the interrupt handler */
JS_SetInterruptHandler(JS_GetRuntime(ctx), interrupt_handler, NULL);
}
ret = JS_Eval(ctx, str, len, "<evalScript>", JS_EVAL_TYPE_GLOBAL);
if (--eval_script_recurse == 0) {
/* remove the interrupt handler */
JS_SetInterruptHandler(JS_GetRuntime(ctx), NULL, NULL);
os_pending_signals &= ~((uint64_t)1 << SIGINT);
/* convert the uncatchable "interrupted" error into a normal error
so that it can be caught by the REPL */
if (JS_IsException(ret))
JS_ResetUncatchableError(ctx);
}
return ret;
}
static JSClassID js_std_file_class_id;
typedef struct {
FILE *f;
BOOL close_in_finalizer;
} JSSTDFile;
static void js_std_file_finalizer(JSRuntime *rt, JSValue val)
{
JSSTDFile *s = JS_GetOpaque(val, js_std_file_class_id);
if (s) {
if (s->f && s->close_in_finalizer)
fclose(s->f);
js_free_rt(rt, s);
}
}
static JSValue js_new_std_error(JSContext *ctx, int err)
{
JSValue obj;
/* XXX: could add a specific Error prototype */
obj = JS_NewError(ctx);
JS_DefinePropertyValueStr(ctx, obj, "message",
JS_NewString(ctx, strerror(err)),
JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
JS_DefinePropertyValueStr(ctx, obj, "errno",
JS_NewInt32(ctx, err),
JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE);
return obj;
}
static JSValue js_std_error_constructor(JSContext *ctx, JSValueConst new_target,
int argc, JSValueConst *argv)
{
int err;
if (JS_ToInt32(ctx, &err, argv[0]))
return JS_EXCEPTION;
return js_new_std_error(ctx, err);
}
static JSValue js_std_error_strerror(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
int err;
if (JS_ToInt32(ctx, &err, argv[0]))
return JS_EXCEPTION;
return JS_NewString(ctx, strerror(err));
}
static JSValue js_std_throw_errno(JSContext *ctx, int err)
{
JSValue obj;
obj = js_new_std_error(ctx, err);
if (JS_IsException(obj))
obj = JS_NULL;
return JS_Throw(ctx, obj);
}
static JSValue js_new_std_file(JSContext *ctx, FILE *f, BOOL close_in_finalizer)
{
JSSTDFile *s;
JSValue obj;
obj = JS_NewObjectClass(ctx, js_std_file_class_id);
if (JS_IsException(obj))
return obj;
s = js_mallocz(ctx, sizeof(*s));
if (!s) {
JS_FreeValue(ctx, obj);
return JS_EXCEPTION;
}
s->close_in_finalizer = close_in_finalizer;
s->f = f;
JS_SetOpaque(obj, s);
return obj;
}
static JSValue js_std_open(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *filename, *mode = NULL;
FILE *f;
filename = JS_ToCString(ctx, argv[0]);
if (!filename)
goto fail;
mode = JS_ToCString(ctx, argv[1]);
if (!mode)
goto fail;
if (mode[strspn(mode, "rwa+b")] != '\0') {
js_std_throw_errno(ctx, EINVAL);
goto fail;
}
f = fopen(filename, mode);
JS_FreeCString(ctx, filename);
JS_FreeCString(ctx, mode);
if (!f)
return js_std_throw_errno(ctx, errno);
return js_new_std_file(ctx, f, TRUE);
fail:
JS_FreeCString(ctx, filename);
JS_FreeCString(ctx, mode);
return JS_EXCEPTION;
}
static JSValue js_std_tmpfile(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f;
f = tmpfile();
if (!f)
return js_std_throw_errno(ctx, errno);
return js_new_std_file(ctx, f, TRUE);
}
static JSValue js_std_sprintf(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
return js_printf_internal(ctx, argc, argv, NULL);
}
static JSValue js_std_printf(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
return js_printf_internal(ctx, argc, argv, stdout);
}
static FILE *js_std_file_get(JSContext *ctx, JSValueConst obj)
{
JSSTDFile *s = JS_GetOpaque2(ctx, obj, js_std_file_class_id);
if (!s)
return NULL;
if (!s->f) {
js_std_throw_errno(ctx, EBADF);
return NULL;
}
return s->f;
}
static JSValue js_std_file_puts(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv, int magic)
{
FILE *f;
int i;
const char *str;
if (magic == 0) {
f = stdout;
} else {
f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
}
for(i = 0; i < argc; i++) {
str = JS_ToCString(ctx, argv[i]);
if (!str)
return JS_EXCEPTION;
fputs(str, f);
JS_FreeCString(ctx, str);
}
return JS_UNDEFINED;
}
static JSValue js_std_file_close(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
JSSTDFile *s = JS_GetOpaque2(ctx, this_val, js_std_file_class_id);
if (!s)
return JS_EXCEPTION;
if (!s->f)
return js_std_throw_errno(ctx, EBADF);
fclose(s->f);
s->f = NULL;
return JS_UNDEFINED;
}
static JSValue js_std_file_printf(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
return js_printf_internal(ctx, argc, argv, f);
}
static JSValue js_std_file_flush(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
fflush(f);
return JS_UNDEFINED;
}
static JSValue js_std_file_tell(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
int64_t pos;
if (!f)
return JS_EXCEPTION;
#if defined(__linux__)
pos = ftello(f);
#else
pos = ftell(f);
#endif
return JS_NewInt64(ctx, pos);
}
static JSValue js_std_file_seek(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
int64_t pos;
int whence, ret;
if (!f)
return JS_EXCEPTION;
if (JS_ToInt64(ctx, &pos, argv[0]))
return JS_EXCEPTION;
if (JS_ToInt32(ctx, &whence, argv[1]))
return JS_EXCEPTION;
#if defined(__linux__)
ret = fseeko(f, pos, whence);
#else
ret = fseek(f, pos, whence);
#endif
if (ret < 0)
return js_std_throw_errno(ctx, EBADF);
return JS_UNDEFINED;
}
static JSValue js_std_file_eof(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
return JS_NewBool(ctx, feof(f));
}
static JSValue js_std_file_fileno(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
return JS_NewInt32(ctx, fileno(f));
}
static JSValue js_std_file_read_write(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv, int magic)
{
FILE *f = js_std_file_get(ctx, this_val);
uint64_t pos, len;
size_t size, ret;
uint8_t *buf;
if (!f)
return JS_EXCEPTION;
if (JS_ToIndex(ctx, &pos, argv[1]))
return JS_EXCEPTION;
if (JS_ToIndex(ctx, &len, argv[2]))
return JS_EXCEPTION;
buf = JS_GetArrayBuffer(ctx, &size, argv[0]);
if (!buf)
return JS_EXCEPTION;
if (pos + len > size)
return JS_ThrowRangeError(ctx, "read/write array buffer overflow");
if (magic)
ret = fwrite(buf + pos, 1, len, f);
else
ret = fread(buf + pos, 1, len, f);
return JS_NewInt64(ctx, ret);
}
/* XXX: could use less memory and go faster */
static JSValue js_std_file_getline(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
int c;
DynBuf dbuf;
JSValue obj;
if (!f)
return JS_EXCEPTION;
js_std_dbuf_init(ctx, &dbuf);
for(;;) {
c = fgetc(f);
if (c == EOF) {
if (dbuf.size == 0) {
/* EOF */
dbuf_free(&dbuf);
return JS_NULL;
} else {
break;
}
}
if (c == '\n')
break;
if (dbuf_putc(&dbuf, c)) {
dbuf_free(&dbuf);
return JS_ThrowOutOfMemory(ctx);
}
}
obj = JS_NewStringLen(ctx, (const char *)dbuf.buf, dbuf.size);
dbuf_free(&dbuf);
return obj;
}
/* XXX: could use less memory and go faster */
static JSValue js_std_file_readAsString(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
int c;
DynBuf dbuf;
JSValue obj;
uint64_t max_size64;
size_t max_size;
JSValueConst max_size_val;
if (!f)
return JS_EXCEPTION;
if (argc >= 1)
max_size_val = argv[0];
else
max_size_val = JS_UNDEFINED;
max_size = (size_t)-1;
if (!JS_IsUndefined(max_size_val)) {
if (JS_ToIndex(ctx, &max_size64, max_size_val))
return JS_EXCEPTION;
if (max_size64 < max_size)
max_size = max_size64;
}
js_std_dbuf_init(ctx, &dbuf);
while (max_size != 0) {
c = fgetc(f);
if (c == EOF)
break;
if (dbuf_putc(&dbuf, c)) {
dbuf_free(&dbuf);
return JS_EXCEPTION;
}
max_size--;
}
obj = JS_NewStringLen(ctx, (const char *)dbuf.buf, dbuf.size);
dbuf_free(&dbuf);
return obj;
}
static JSValue js_std_file_getByte(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
if (!f)
return JS_EXCEPTION;
return JS_NewInt32(ctx, fgetc(f));
}
static JSValue js_std_file_putByte(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
FILE *f = js_std_file_get(ctx, this_val);
int c;
if (!f)
return JS_EXCEPTION;
if (JS_ToInt32(ctx, &c, argv[0]))
return JS_EXCEPTION;
c = fputc(c, f);
return JS_NewInt32(ctx, c);
}
static JSClassDef js_std_file_class = {
"FILE",
.finalizer = js_std_file_finalizer,
};
static const JSCFunctionListEntry js_std_funcs[] = {
JS_CFUNC_DEF("exit", 1, js_std_exit ),
JS_CFUNC_DEF("gc", 0, js_std_gc ),
JS_CFUNC_DEF("evalScript", 1, js_evalScript ),
JS_CFUNC_DEF("loadScript", 1, js_loadScript ),
JS_CFUNC_DEF("getenv", 1, js_std_getenv ),
/* FILE I/O */
JS_CFUNC_DEF("open", 2, js_std_open ),
JS_CFUNC_DEF("tmpfile", 0, js_std_tmpfile ),
JS_CFUNC_MAGIC_DEF("puts", 1, js_std_file_puts, 0 ),
JS_CFUNC_DEF("printf", 1, js_std_printf ),
JS_CFUNC_DEF("sprintf", 1, js_std_sprintf ),
JS_PROP_INT32_DEF("SEEK_SET", SEEK_SET, JS_PROP_CONFIGURABLE ),
JS_PROP_INT32_DEF("SEEK_CUR", SEEK_CUR, JS_PROP_CONFIGURABLE ),
JS_PROP_INT32_DEF("SEEK_END", SEEK_END, JS_PROP_CONFIGURABLE ),
/* setenv, ... */
};
static const JSCFunctionListEntry js_std_error_funcs[] = {
JS_CFUNC_DEF("strerror", 1, js_std_error_strerror ),
/* various errno values */
#define DEF(x) JS_PROP_INT32_DEF(#x, x, JS_PROP_CONFIGURABLE )
DEF(EINVAL),
DEF(EIO),
DEF(EACCES),
DEF(EEXIST),
DEF(ENOSPC),
DEF(ENOSYS),
DEF(EBUSY),
DEF(ENOENT),
DEF(EPERM),
DEF(EPIPE),
DEF(EBADF),
#undef DEF
};
static const JSCFunctionListEntry js_std_file_proto_funcs[] = {
JS_CFUNC_DEF("close", 0, js_std_file_close ),
JS_CFUNC_MAGIC_DEF("puts", 1, js_std_file_puts, 1 ),
JS_CFUNC_DEF("printf", 1, js_std_file_printf ),
JS_CFUNC_DEF("flush", 0, js_std_file_flush ),
JS_CFUNC_DEF("tell", 0, js_std_file_tell ),
JS_CFUNC_DEF("seek", 2, js_std_file_seek ),
JS_CFUNC_DEF("eof", 0, js_std_file_eof ),
JS_CFUNC_DEF("fileno", 0, js_std_file_fileno ),
JS_CFUNC_MAGIC_DEF("read", 3, js_std_file_read_write, 0 ),
JS_CFUNC_MAGIC_DEF("write", 3, js_std_file_read_write, 1 ),
JS_CFUNC_DEF("getline", 0, js_std_file_getline ),
JS_CFUNC_DEF("readAsString", 0, js_std_file_readAsString ),
JS_CFUNC_DEF("getByte", 0, js_std_file_getByte ),
JS_CFUNC_DEF("putByte", 1, js_std_file_putByte ),
/* setvbuf, ferror, clearerr, ... */
};
static int js_std_init(JSContext *ctx, JSModuleDef *m)
{
JSValue proto, obj;
/* FILE class */
/* the class ID is created once */
JS_NewClassID(&js_std_file_class_id);
/* the class is created once per runtime */
JS_NewClass(JS_GetRuntime(ctx), js_std_file_class_id, &js_std_file_class);
proto = JS_NewObject(ctx);
JS_SetPropertyFunctionList(ctx, proto, js_std_file_proto_funcs,
countof(js_std_file_proto_funcs));
JS_SetClassProto(ctx, js_std_file_class_id, proto);
JS_SetModuleExportList(ctx, m, js_std_funcs,
countof(js_std_funcs));
JS_SetModuleExport(ctx, m, "in", js_new_std_file(ctx, stdin, FALSE));
JS_SetModuleExport(ctx, m, "out", js_new_std_file(ctx, stdout, FALSE));
JS_SetModuleExport(ctx, m, "err", js_new_std_file(ctx, stderr, FALSE));
obj = JS_NewCFunction2(ctx, js_std_error_constructor,
"Error", 1, JS_CFUNC_constructor, 0);
JS_SetPropertyFunctionList(ctx, obj, js_std_error_funcs,
countof(js_std_error_funcs));
JS_SetModuleExport(ctx, m, "Error", obj);
/* global object */
JS_SetModuleExport(ctx, m, "global", JS_GetGlobalObject(ctx));
return 0;
}
JSModuleDef *js_init_module_std(JSContext *ctx, const char *module_name)
{
JSModuleDef *m;
m = JS_NewCModule(ctx, module_name, js_std_init);
if (!m)
return NULL;
JS_AddModuleExportList(ctx, m, js_std_funcs, countof(js_std_funcs));
JS_AddModuleExport(ctx, m, "in");
JS_AddModuleExport(ctx, m, "out");
JS_AddModuleExport(ctx, m, "err");
JS_AddModuleExport(ctx, m, "global");
JS_AddModuleExport(ctx, m, "Error");
return m;
}
/**********************************************************/
/* 'os' object */
static JSValue js_os_return(JSContext *ctx, ssize_t ret)
{
if (ret < 0)
ret = -errno;
return JS_NewInt64(ctx, ret);
}
static JSValue js_os_open(JSContext *ctx, JSValueConst this_val,
int argc, JSValueConst *argv)
{
const char *filename;